Ah thanks, llkyway,
I've both types of Dyneema for about nearly 2 weeks, and despite handling them on a daily basis, I've only just noticed the difference!
In fact, if not for bchaplin's close up photo at the start of this thread, I probably wouldn't have looked closer.
Another thing is, I've also realized that 200d and 400d can be identified by touch alone.
Slow huh? But I think I just took my TB geekness to another level lol
yeah, I agree that it's probably for strength, but it works great for aesthetic purposes too! ^.^
Though I'm wondering why the 400d doesn't have it, overkill perhaps? lol